You know how when you draw you first make sketches right? Well, these are some guitar sketches... doodles, scribbles. You name it. It presents an idea, as a draft, not a finished masterpiece. Perhaps, it also relates to impressionism:
Impressionism
a : the depiction (as in literature) of scene, emotion, or character by details intended to achieve a vividness or effectiveness more by evoking subjective and sensory impressions than by recreating an objective reality
b : a style of musical composition designed to create subtle moods and impressions